diff --git a/.env-sample b/.env-sample
index ec05862..c22e5b6 100644
--- a/.env-sample
+++ b/.env-sample
@@ -39,4 +39,4 @@ LIVEKIT_NODE_IP=127.0.0.1
 COUNTRY=GB
 
 # as a convenience for creating /etc/hosts
-DOMAINS=($DOMAIN $HOMESERVER_FQDN $MAS_FQDN $ELEMENT_WEB_FQDN $ELEMENT_CALL_FQDN $LIVEKIT_FQDN $LIVEKIT_JWT_FQDN)
+DOMAINS="$DOMAIN $HOMESERVER_FQDN $MAS_FQDN $ELEMENT_WEB_FQDN $ELEMENT_CALL_FQDN $LIVEKIT_FQDN $LIVEKIT_JWT_FQDN"
diff --git a/README.md b/README.md
index 876ceec..19e84e0 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,7 @@ For production-grade Matrix from Element, please see https://element.io/server-s
 
 # Point DNS for *.domain at your docker host,
 # Or if running on localhost with mkcert:
-# source .env; sudo echo "127.0.0.1 ${DOMAINS[@]}" >> /etc/hosts
+# source .env; sudo sh -c echo "127.0.0.1 $DOMAINS >> /etc/hosts"
 
 docker compose up
 # go to https://element on your domain.
diff --git a/init-letsencrypt.sh b/init-letsencrypt.sh
index 13dc8e3..04297d7 100755
--- a/init-letsencrypt.sh
+++ b/init-letsencrypt.sh
@@ -10,7 +10,7 @@ if ! [ -x "$(command -v docker)" ]; then
 fi
 
 source .env
-domains=("${DOMAINS[@]}") # deep copy the array
+domains=($DOMAINS)
 rsa_key_size=4096
 data_path="./data/certbot"
 read -p "admin email address for letsencrypt: " email